CN102175123B - Hole positioning tensioning device - Google Patents

Abstract

The invention relates to a hole coaxial positioning device, in particular to a hole positioning tensioning device capable of obtaining precise coaxiality of a to-be-positioned hole with a reference hole. The hole positioning tensioning device comprises a coaxiality positioning rod, wherein the front end of the coaxiality positioning rod is a column body; the rear part of the column body is a coaxial taper body; the device further comprises a guide sleeve, and an elastic expansion sleeve; the elastic expansion sleeve is sleeved on the taper body of the coaxiality positioning rod; the guide sleeve is sleeved on the rod body at rear part of the coaxiality positioning rod; the guide sleeve is internally provided with a spring; the spring is arranged between the guide sleeve and the coaxiality positioning rod body; two heads of the guide sleeve are provided with a baffle spring nut and a baffle sleeve nut; the inner chamber wall of the elastic expansion sleeve is a taper surface configured with the coaxiality positioning rod body; and one end of the elastic expansion sleeve is connected with the guide sleeve through the baffle sleeve nut.

Description

Hole Positioning Tensioning Device

technical field

The invention relates to a hole coaxial positioning device, in particular to a hole positioning tensioning device capable of obtaining precise coaxiality between a hole to be positioned and a reference hole.

Background technique

For the glass manufacturing industry, when the positioning hole and the reference hole of the glass product are coaxially positioned using conventional methods, the coaxiality positioning rod is generally used for positioning. The front end of the coaxial positioning rod has two upper and lower cylinders that are coaxial with each other. The lower cylinder is matched with the reference hole, and the upper positioning cylinder is matched with the hole to be positioned. Due to the manufacturing tolerance of the hole to be positioned , there is a gap between the positioning hole and the coaxiality rod. In order to reduce or eliminate the positioning gap, the cylinder at the rear end of the coaxiality positioning rod needs to be adapted according to the hole tolerance or changed to a tapered surface; however, the taper Although the structure can eliminate the gap, as the diameter tolerance changes, axial displacement will also occur, and the stability of the contact positioning of the positioning hole with the cone structure is poor.

Contents of the invention

The object of the present invention is to provide a hole positioning tensioning device which can obtain precise coaxiality between the hole to be positioned and the reference hole.

In order to achieve the above object, the technical solution of the present invention is as follows: the hole positioning tensioning device includes a coaxiality positioning rod, the front end of the coaxiality positioning rod is a cylinder, and the rear part of the cylinder is a cone coaxial with it, which is different The advantage is that it also includes a guide sleeve and an elastic expansion sleeve, the elastic expansion sleeve is set on the cone of the coaxiality positioning rod, the guide sleeve is set on the rod body at the rear of the cone of the coaxiality positioning rod, the guide sleeve There is a spring inside, and the spring is installed between the guide sleeve and the coaxiality positioning rod. The two ends of the guide sleeve are respectively equipped with retaining spring nuts and retaining sleeve nuts. The conical surface of the positioning rod cone is configured, and one end of the elastic expansion sleeve is connected with the guide sleeve through the retaining sleeve nut.

The advantage of the present invention is that: the present invention installs an elastic expansion sleeve on the cone of the coaxiality positioning rod. The inner diameter of the elastic expansion sleeve is a conical surface, which keeps fit with the conical surface of the rod. The size ratio of the outer diameter of the elastic expansion sleeve is to be determined. The hole diameter is slightly smaller. When the elastic expansion sleeve is driven by the guide sleeve to move axially on the cone of the coaxiality positioning rod, the expansion sleeve will expand and contract radially, so that the positioning gap can be eliminated during positioning. Disengagement positioning; the function of the inner cavity spring design can ensure that the spring expansion sleeve is in a locked state in the free state when there is no gap positioning, and can prevent the positioning failure of the device or positioning sample due to radial changes caused by axial displacement.

Description of drawings

Fig. 1 is a front view of the hole positioning tensioning device of the present invention.

Detailed ways

The specific implementation is described below in conjunction with accompanying drawing:

As shown in Figure 1, the hole positioning and tensioning device includes a coaxiality positioning rod 1. The front end of the coaxiality positioning rod 1 is a cylinder, and the rear part of the cylinder is a cone coaxial with it. In addition, the hole positioning and tensioning The device is also provided with a guide sleeve 4 and an elastic expansion sleeve 2. The elastic expansion sleeve 2 is set on the cone of the coaxiality positioning rod 1, and the guide sleeve 4 is set on the rod at the rear of the cone of the coaxiality positioning rod 1. On the body, a spring 5 is arranged inside the guide sleeve 4, and the spring 5 is installed between the rod body of the guide sleeve 4 and the coaxiality positioning rod 1, and the two ends of the guide sleeve 4 are respectively installed with a retaining spring nut 6 and a retaining sleeve nut 3. The inner cavity wall of the elastic expansion sleeve 2 is a conical surface configured with the coaxial positioning rod 1 , and one end of the elastic expansion sleeve 2 is connected with the guide sleeve 4 through the retaining sleeve nut 3 .

The specific structure of the device is shown in the figure, and the basic composition and working process are as follows:

The coaxiality positioning rod 1 is fixed together with the handle 7 through the set screw 8 to form the first assembly; the two ends of the guide sleeve 4 are respectively equipped with retaining spring nuts 6 and retaining sleeve nuts 3 to form the second assembly. When working, the sample 9 to be positioned is first stacked on the reference piece 10, and the front end cylinder of the coaxiality positioning rod 1 of the first component is inserted into the reference hole. When moving away from the direction (refer to the displacement of the handle 7 relative to the guide sleeve 4), the elastic expansion sleeve 2 is pushed by the end face of the guide sleeve 4, and moves along the small end of the cone surface of the positioning rod 1, so that the elastic expansion sleeve 2 contracts and shrinks radially. When the elastic expansion sleeve 2 can be easily placed in the positioning hole of the sample to be positioned; when the above-mentioned first component and the second component are axially displaced in the opposite direction, the elastic expansion sleeve 2 is pulled by the retaining sleeve nut 3 along the positioning The large end of the cone surface of the rod 1 moves, and the elastic expansion sleeve 2 is expanded to increase radially. When the elastic expansion sleeve 2 expands to completely contact with the hole of the positioning sample, the coaxial positioning is completed. At this time, the coaxial positioning in the first component The shaft shoulder of the axial positioning rod 1 and the retaining spring nut 6 in the second component are respectively pressed by the spring 5, so that the force between the first component and the second component is axially opposite, so the elastic expansion sleeve 2 is pressed The pulling force of the retainer nut 3 keeps it in contact with the positioning hole of the sample to be positioned without gaps, thereby obtaining a constant pre-tightening force and keeping the positioning hole in a gap-free positioning state, ensuring the positioning of the reference hole and the sample to be measured Coaxial positioning of holes.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (1)

1. Hole positioning tensioning device, including coaxiality positioning rod, the front end of the coaxiality positioning rod is a cylinder, and the rear part of the cylinder is a cone coaxial with it. It is characterized in that it also includes a guide sleeve, an elastic expansion The elastic expansion sleeve is set on the cone of the coaxiality positioning rod, and the guide sleeve is set on the rod body at the rear of the cone of the coaxiality positioning rod. The inside of the guide sleeve is equipped with a spring, and the spring is installed on the guide Between the sleeve and the coaxiality positioning rod body, the two ends of the guide sleeve are respectively equipped with retaining spring nuts and retaining sleeve nuts. One end of the expansion sleeve is connected with the guide sleeve through the retaining sleeve nut.

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